Abyssal sediments, polymetallic nodules, and water-column samples were collected from the UKSRL1 claim area within the Clarion-Clipperton fracture zone in the Pacific Ocean.

We evaluated the potential for abrupt increases in inorganic N sources to induce cascading effects on DOM and microbial communities in the surface ocean. We collected water from 5 m depth in the central North Pacific and amended duplicate 20 L polycarbonate carboys with nitrate or ammonium, tracking planktonic carbon fixation DOM production DOM composition and microbial community structure responses over 1 week relative to controls

Although a growing body of evidence has indicated that tuna can thermoregulate and have body temperatures that are decoupled from immediate changes in ambient temperature, demonstrating the extend and time-course of body temperature changes in tuna moving through theri natural environments had proved to be elusive. Here we use body temperature data telemetered from free-swimming fish to demonstrate short-latency physiological thermoregulation in bigeye tuna. We used a recently developmed modeling system to determine the magnitude and time-course of the whole-body thermal conductivity changes that would result in body temperature changes observed in fish in the wild. The results indicate rapid, 100 to 1000-fold changes in whole-body thermal conductivity that occur in response to quickly changing ambient temperatures. Coupling this physiological response with behavioral thermoregulation expands the forage space of these animals by permitting acivity in wide ranges of water temperatures and depths.